521326828 has 24 divisors (see below), whose sum is σ = 1053806544. Its totient is φ = 223027200.

The previous prime is 521326789. The next prime is 521326829. The reversal of 521326828 is 828623125.

It is not an unprimeable number, because it can be changed into a prime (521326829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 347733 + ... + 349228.

It is an arithmetic number, because the mean of its divisors is an integer number (43908606).

Almost surely, 2^521326828 is an apocalyptic number.

It is an amenable number.

521326828 is an abundant number, since it is smaller than the sum of its proper divisors (532479716).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

521326828 is a wasteful number, since it uses less digits than its factorization.

521326828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696993 (or 696991 counting only the distinct ones).

The product of its digits is 46080, while the sum is 37.

The square root of 521326828 is about 22832.5825959308. The cubic root of 521326828 is about 804.8285210148.

It can be divided in two parts, 5213 and 26828, that added together give a square (32041 = 179²).

The spelling of 521326828 in words is "five hundred twenty-one million, three hundred twenty-six thousand, eight hundred twenty-eight".